Added by Acts 1983, 68th Leg., p. 3828, ch. 599, Sec. 1, eff. Aug. 29, 1983. Sec. 3 amended by Acts 1987, 70th Leg., ch. 998, Sec. 1, eff. Aug. 31, 1987.

Amended by Acts 1987, 70th Leg., 2nd C.S., ch. 55, Sec. 1, eff. Oct. 20, 1987; Sec. 3(a) amended by Acts 1991, 72nd Leg., ch. 266, Sec. 1, eff. Sept. 1, 1991; Sec. 1 amended by Acts 1995, 74th Leg., ch. 76, Sec. 14.24, eff. Sept. 1, 1995; Sec. 1 amended by Acts 2001, 77th Leg., ch. 338, Sec. 1, eff. Sept. 1, 2001; Sec. 2(c) amended by Acts 2001, 77th Leg., ch. 338, Sec. 2, eff. Sept. 1, 2001; Sec. 3(a) amended by Acts 2001, 77th Leg., ch. 338, Sec. 3, eff. Sept. 1, 2001; Sec. 4(a), (b) amended by Acts 2001, 77th Leg., ch. 338, Sec. 4, eff. Sept. 1, 2001; Sec. 5(a), (b) amended by Acts 2001, 77th Leg., ch. 338, Sec. 5, eff. Sept. 1, 2001; Sec. 8(a) amended by Acts 2001, 77th Leg., ch. 338, Sec. 6, eff. Sept. 1, 2001; Sec. 9 amended by Acts 2001, 77th Leg., ch. 338, Sec. 7, eff. Sept. 1, 2001; Sec. 10 amended by Acts 2001, 77th Leg., ch. 338, Sec. 8, eff. Sept. 1, 2001.

Acts 2007, 80th Leg., R.S., Ch. 593 (H.B. 8), Sec. 3.16, eff. September 1, 2007.

Acts 2011, 82nd Leg., R.S., Ch. 1 (S.B. 24), Sec. 2.06, eff. September 1, 2011.

Acts 2021, 87th Leg., R.S., Ch. 221 (H.B. 375), Sec. 2.11, eff. September 1, 2021.